Dashboard-lamp cap



Oct. 21 1924. 1,512,778

N. B. LUNDAHL DASHBOARD LAMP CAP Filed Aug. 29 1923 Patented @ct. 21, 1924.

:; STATES I I siane ATENT FFICE.

NELS B. LUNDAHL, or BERWYN, ILLINOIS. I

1! '0 all whom it may concern: 7

Be it known that I, Nnns B. LUNDAHL, a citizen of the United States, residing at Berwyn, in the county of Cook and Stateof Illinois, have invented certain new and useful Improvements in Dashboard-Lamp Caps, of which the following is a specification.

In United States Letters Patent 1, l 10,738, issued to me on January 2, 1923, there is disclosed, among other things, a dash board lamp cap embodying a hollow opaque body open at one end so that the cap may be readily placed over a lamp, the body of the cap having an unobstructed opening for the light rays and also translucent portions which latter are in the form of separate pieces fitted into openings which pass through the body of the cap.

In practice it has been found that these translucent pieces occasionally drop out of place due to the fact that the substance used in securing them in position gives way or dries out. It is one of the objects of the present invention to provide improved means for securing the translucent pieces in their seats and against accidental displacement and at the same time dispense with the he cessity for the use of a securing cement or the like. I j

The cap as heretofore constructed embodied a hood having an opening through which the light rays pass, the end of the hood adjacent said opening being split to form a spring like portion for frictionally and removably securing the hood in position.

lVith this construction the cap may be readily removed by an unauthorized person as the friction between the parts is not suflicient to prevent ready detachment. Furthermore the base of the lamps in connection with which the hood is to be used vary in diameter and no means has heretofore been employed for contracting the said spring like portion to cause the hood to grip the lamp base of smaller diameter.

It is another object of the present invention to provide improved means in a cap or hood of this character for contracting the spring portion thereof and for increasing the gripping action of the cap or hood so that it may be securely fastened in position and against unauthorized removal only with considerable difficulty.

To the attainment of these ends and the cempl shmeet 9f ether new and use u i e- DASHBOARD-LAMP oer.

AppIication filled August 29, 1923. Serial No. 659,860.

sults the invention consists in the features of novelty in substantially theconstruction, combination, and arrangementof the several parts hereinafter more fully described and claimed and as shown in the accompanying drawings and in which;

Fig. 1 isa side elevation of a cap con structed in accordance with the principles of this invention.

Fig. 2 is an'end elevation of Figure 1.

Fig. 3 is an enlarged sectional view as taken on line 33 Figure 2, and showing the same as applied to a dash board lamp. 1

Fig. 4 is a sectional view taken online 44 Figure 3. i Referring more particularly to the drawing the numeral 10, designates generally the cap or body portion which is provided through one of its walls with an unobstructed opening 11, arranged so that when the cap is in position the rays from the lamp 12, will be directed through the said opening and upon the object to be illuminated.

The cap is provided with a slot 13, extending through the end of the wall and communicating with the opening 11, so as to form a spring like portion into which the base 14, of the lamp 12, extends. The said spring like portion operates to frictionally grip the said base portion 141, of the lamp to frictionally hold the cap in position.

If desired the cap may be reduced on its inner face adjacent the open end thereof to form a shoulder 15, for limiting the insertion of the base 14L, into thecap.

The walls of the spring like portionof the cap, preferably adjacent the end of the cap are provided with opposed lugs or cars 16, 17, the ear 17, being preferably threaded to receive the end of the screw or bolt 18.

The bolt preferably passes loosely through an opening in the ear or lug 16, and

the head 19, of the screw or bolt engages the wall of the opening through the ear 16.,

so that when the screw or bolt is threaded into the ear 17, the two cars will be drawn together as well as the walls of the slotted portion of the cap to firmly clamp the cap, upon the base 14, of the lamp. If desired the ear 16, may be recessed as shown in Figure 4, to receive the head 19, of the screw or bolt 18, so that the end of the latter will not project beyond the ear.

To remove the cap it is only necessary to loosen the screw or bolt and the natural spring of the adjacent portion of the cap will cause thelatter to expand sufliciently so that the cap may be readily removed.

The body of the cap is provided With any desired number of openings therethrough the Walls of which openings are shaped to form seats 20 and in Which openings are arranged translucent elements 20, Whichrest upon the seats 20, and form closures for the openings and may if desired be of the same or different colors.'

. The translucent elements are of a configuration to conform to the contour of the openings and are secured in position by defleeting a portion of the Wall of the open-V ing over the edge or periphery of the element seated in the opening, as at 21, in any suitable manner but preferably by spinning the same. v

lVith this construction it will be manifest that the translucent elements will be firmly secured in position and the securing means will not be affected by the heat from the lamp. I

Further with this improved method of securing the translucent elements 20, Within the openings, it Will be manifest that the fastening means for the translucent elements Will not be aflected by the contraction and expansion of the body portion of the cap or hood. v 7

While the preferred form of the invention has been herein fully described and shown, it is tobe understood that various changes may be made in the details of construction vand in the combination and arrangement of the parts, Within the scope of the claim Without departing from the spirit of the invention.

What is claimed as new is A lamp cap of the, character described embodying a hood adapted to be'placed over a lamp and having an area in the Wall for the light rays to pass through, the extremity of the hood adjacent the open end thereof being split for removably and fricti0nally securing the'hood in position, projections integral with the base of thehood and adjacent opposite Walls of the said split portion, and a headed screw passing through one of the said projections transversely of the slot and having threaded engagement With the other of the said projections and operable to draw the projections together to contract the split end of the hood directly around the base of the lamp.

In testimonywhereof I have signed my name to this specification, on this 25th day of August, A. 'D. 1923.

NELS B. LUNDA l-IL. 

